Lighting device

a technology of light source and light source, which is applied in the direction of lighting and heating equipment, fixed installations, instruments, etc., can solve the problems of glare, excessive energy consumption, and light that is reflected on the furniture is too bright, so as to improve the effect of the luminair

US8277106B2Active Publication Date: 2012-10-02SIGNIFY HLDG BV
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
Publication Date
2012-10-02

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Abstract

The present invention provides a lighting device, comprising a first light guide adapted to guide light and output the light in a first direction; a second light guide adapted to guide light and output the light in another, second direction; a dividing structure adapted to receive light from a light source and guide the light into the first light guide and into the second light guide, wherein the dividing structure comprises controllable dividing means for guiding a first percentage of the light from the light source into the first light guide, and a second percentage of the light from the light source into the second light guide.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to a lighting device to provide adjustable lighting.BACKGROUND OF THE INVENTION

[0002] The following provides a general introduction, and includes an extract from Wikipedia. Please see http: / / en.wikipedia.org / wiki / Lighting#Fixtures.

[0003] Lighting fixtures come in a wide variety of styles for various functions. Some are very plain and functional, while others are pieces of art in themselves. Nearly any material can be used, so long as it can tolerate the heat and is in keeping with safety codes.

[0004] Lighting types are classified by intended use as general, localized, or task lighting, depending largely on the distribution of the light produced by the fixture.

[0005] General lighting fills in between the two and is intended for general illumination of an area. Indoors, this would be a basic lamp on a table or floor, or a fixture on the ceiling. Outdoors, general lighting for a parking lot may be as low as 10-20 lux (1-2 foot-candl...

Examples

Embodiment Construction

[0049]FIGS. 1 and 2 show a lighting device 1 according to the present invention, comprising a first light guide 2 adapted to guide and internally reflect light 4 and output the light in a first direction 6. The device 1 comprises a second light guide 8 adapted to guide and internally reflect light and output the light in another, second direction. The first light guide and the second light guide are flat panel light guides, comprising at one end a reflecting surface 10, 12 for determining the first direction and the second direction, respectively. The first and second light guide are adjacent and parallel to each other.

[0050]At the opposite end, the first and second light guide are coupled to a dividing structure 16 that is adapted to receive light from a light source 18 and guide a first percentage of the light into the first light guide 2 and a second percentage of the light into the second light guide 8. The dividing structure comprises a tapered body having reflective walls 20, ...